How can I be more grateful via /r/gratitude

The past summer I’ve been in a bit of a rut. For some reason instead of just rolling with the punches and keeping my head up I’ve been wallowing in my sorrows. I’ve been thinking and I realized I have a lot to be grateful for a roof over my head, a supportive family etc. Things could be a million times worse than they actually are. I’ve been walking around all doom and gloom and I’d like to shift my mindset to be more positive. I guess I’ve always been “glass half empty.” So if anyone else has any tips on maintaining a positive outlook I would appreciate it.